AVO is lowering the Aviation Color Code to GREEN, and the Volcanic Activity Alert Level to Normal at Korovin. The volcano has been at Color Code YELLOW and Alert Level Advisory since November 6, 2006. Over the last several months, seismicity rates have declined to near background levels. Recent satellite data also indicate that ground deformation at Korovin has slowed markedly, and perhaps ceased altogether, after a period of uplift from approximately mid-summer 2006 through early-spring 2007.

Steam emissions from Korovin and occasional bursts of low-level earthquakes or volcanic tremor will likely still occur, but both of these phenomena are typical of background activity for this volcano, which has a long-lived, well-developed hydrothermal system.

VOLCANO ALERT LEVELS

NORMALVolcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.

ADVISORYVolcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

WATCHVolcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.

WARNINGHazardous eruption is imminent, underway, or suspected.

AVIATION COLOR CODES

GREENVolcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.

YELLOWVolcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

ORANGEVolcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].

REDEruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].